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CVE-2004-0403

16
FAUCET Score

CVE-2004-0403 describes a denial-of-service vulnerability in Racoon, specifically versions prior to 20040408a, where a remote attacker can exploit a flaw in ISAKMP packet processing. By sending a malformed ISAKMP packet with an excessively large length field, the attacker can cause the affected system to consume significant memory resources, leading to a denial of service. This vulnerability has a CVSS score of 5.0, indicating a medium severity, and is easily exploitable over the network without authentication. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2004-04-08aCPE matchmatch criteria
cpe:2.3:a:kame:racoon:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.85%
Probability of exploitation in next 30 days
EPSS Percentile
85.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0285 is in the 79th percentile among its peer group of 23,684 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: ipsec-tools-0:0.2.5-0.4
View patch

Vendor Advisories (1)

redhatCVE-2004-0403

security flaw

Mar 31, 2004

References

ftp.sco.com / pub/updates/UnixWare/SCOSA-2005.10/SCOSA-2005.10.txt
patches.sgi.com / support/free/security/advisories/20040506-01-U.asc
marc.info
secunia.com / advisories/11410
secunia.com / advisories/11877
security.gentoo.org / glsa/glsa-200404-17.xml
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/15893
sourceforge.net / project/shownotes.php
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11220
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A984
kame.net / dev/cvsweb2.cgi/kame/kame/kame/racoon/isakmp.c.diff
Exploit
mandrakesecure.net / en/advisories/advisory.php
osvdb.org / 5491
redhat.com / support/errata/RHSA-2004-165.html
PatchVendor Advisory
securityfocus.com / bid/10172
vuxml.org / freebsd/ccd698df-8e20-11d8-90d1-0020ed76ef5a.html
Vendor Advisory